Out of stock — order yours soon

The calculator that sees your problem

Snap a photo of any equation — handwritten, textbook, or whiteboard. Nexus Calc reads it, solves it, and shows every step in under a second.

  • 01
    E‑ink display Step‑by‑step solution
  • 02
    Context dial Switch subject in one twist
  • 03
    Cloud toggle On‑device or AI‑assisted
  • 04
    Solve key One tap, full work shown
See how it works
Solves problems across every subject
Algebra Calculus Trigonometry Statistics Physics Chemistry Geometry Linear Algebra Differential Equations Number Theory
AI Provider Settings
1 connected
Anthropic
claude-sonnet-4-5 · Active
Connected
OpenAI
gpt-4o, o1, o3-mini
+ Add key
Google Gemini
gemini-2.0-flash, gemini-pro
+ Add key
Custom endpoint
Any OpenAI-compatible API
+ Add key
Connect
⚿  Keys are stored on-device only — never sent to Nexus servers.
Custom AI

Bring your
own AI brain.

Nexus Calc's camera handles the hard part. But the intelligence behind it? That's up to you. Upload any API key and run the AI model of your choice — directly on your device.

⌨
Your model, your rules
Run GPT-4o, Gemini 2.5 pro, or any OpenAI-compatible endpoint. Switch models mid-session without losing history.
⚿
Keys stay on the device
API keys are encrypted and stored locally on your Nexus Calc. They are never transmitted to our servers — your credentials stay yours.
◎
No rate limit surprises
With Nexus Connect you run on your own provider plan, so your rate limits are whatever your subscription already allows — never a cap we impose. Prefer no setup? Use Nexus Credits instead.
⊕
Compare across models
Snap the same problem and run it through multiple providers side by side. See which model explains the method most clearly for you.
Capabilities

Point the camera.
Get the answer.
See every step.

◉

Snap any equation instantly

The built-in 5MP mini camera reads handwritten notes, printed textbooks, and whiteboard diagrams. No typing required — just aim and press.

Ready to snap
—
◈

What we use to send your question to the AI

AI processing via hotspot or Wi-Fi. Results appear on screen the moment you snap.

↗

Sync to your laptop

Export full solution sets via USB or WiFi. PDF, CSV, or plain text — your format, your workflow.

⊞

Wide-angle FOV

The 70° FOV lens captures textbook pages and whiteboards clearly in a single frame — nothing gets cut off.

70° FOV
⊛

Step-by-step on screen

Every solution broken into numbered steps — so you understand the method, not just the answer.

01
Identify: Definite integral, power rule
02
Apply: ∫x² dx = x³/3 + C
03
Evaluate: [x³/3]₀¹ = 1/3 − 0
04
Answer: 1/3 ≈ 0.333
How it works

Aim. Snap. Done.

01
Aim & snap

Point the built-in camera at any problem — handwritten notes, textbook pages, or a whiteboard — and press the snap button. It works at any angle.

02
AI reads & solves

The AI identifies the problem type, selects the right method, and computes the full solution with step-by-step working — requires an internet connection via hotspot or Wi-Fi.

03
Answer on screen

Results appear directly on the calculator's screen. The answer and full step-by-step working show up exactly where you'd expect — no extra hardware, no separate display.

See it in action

Watch it solve a problem in seconds.

Snap & Solve

Videos coming soon

AI Commands

Videos coming soon

Built Different

Videos coming soon

Get Yours

One calculator.
Every answer.

The AI Calculator
Nexus
Calculator

Point the camera. Get the answer. Every step shown — algebra, calculus, chemistry, physics. No subscription ever.

Camera
5MP · 70° FOV
Connectivity
WiFi ESP32
AI Models
On-device & Cloud
Battery
3-week standby
Storage
Unlimited history
Power
AAA batteries
Out of stock

Not happy with it? Return within 14 days of delivery for a full refund — just send it back unused and in perfect, original condition. See our Returns & Refunds policy for details. Delivery timelines are estimates only; we cannot guarantee arrival by a specific date but will do our best to get your order to you as quickly as possible.

One-time price
$274.99
No subscription. No recurring fees.
Yours forever.
✓
Nexus Calculator
✓
5MP AI camera module
✓
Cloud AI — requires hotspot or Wi-Fi
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Cloud AI with custom API key support
✓
WiFi ESP32 & USB-C cable
✓
Lifetime software updates
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Priority support included
Power Your Device

Two ways to
unlock cloud AI.

Buy Nexus credits for instant solves (no API key needed), or buy Nexus Connect to bring your own key for full model control. Both unlock unlimited subjects: calculus, physics, chemistry, and more.

No API Key Needed
Nexus Credits

Buy a pack, snap a photo, get step-by-step solutions. We auto-route simple problems to fast AI and hard problems to advanced reasoning models.

Models
Gemini Flash & OpenAI o4-mini
Pricing
$5–$20
Expiration
Expiration varies by package
Subjects
All math, physics, chem
Setup
None — buy and solve
Requires
Nexus Calculator
Coming soon
From
$5
50 solves. No key needed.
Expiration varies by package.
✓
No API key required
✓
Auto-routes to best model per problem
✓
1 credit = 1 solve (any difficulty)
✓
Packs: 50/$5 · 110/$10 · 250/$20
✓
Buy more anytime — no subscription
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Step-by-step solutions shown

Or for power users

Subscription
Nexus Connect

Use your own API keys with Nexus Calc's cloud features. We handle the sync, routing, and on-device integration — you control the spend.

Providers
OpenAI · Anthropic · Google
Billing
$10 / month
Cancellation
Anytime, no fees
Key storage
Encrypted, your account
Query limits
Set by your API plan
Requires
Nexus Calculator
Coming soon
Purchased

Subscription requires an active Nexus Calculator and your own valid API key from a supported provider. You are responsible for all charges incurred on your provider account. Cancel anytime from your account dashboard.

Recurring
$10/mo
Bring your own key.
Cancel anytime.
✓
Securely store your API keys in-app
✓
Route cloud queries through your account
✓
No per-question fees from Nexus
✓
Switch providers anytime
✓
Multi-device sync with one key
✓
Cancel anytime — no contract
For educational use only

Nexus Calc is designed as a learning tool to help students understand how problems are solved — step by step. It is not intended for use during exams, tests, or any assessed work where outside assistance is prohibited. By purchasing and using Nexus Calc, you agree to use it only in contexts where it is permitted. Nexus Calc and its creators accept no liability for any academic misconduct, disciplinary action, or consequences arising from misuse of this product.